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NASA Langley Research Center Data by Site by Date (all parameters)

Use this form to retrieve hourly data collected at NASA Langley Research Center. Although this is the most current data, it is not considered official until it has been certified by the technical staff. This information is updated hourly.

This web page provides the most current hourly averaged data available. Our convention for time-tagging data is the beginning of each hour. For example, values shown for the noon hour are based on measurements taken from noon to 1:00 p.m. The noon average will not be calculated until after 1:00 p.m. The noon average will then be available on our external server from 1:15 p.m. to 1:30 p.m. This results in an apparent one-hour time lag in the data. We also present our data in Local Standard Time for each measuring site. During Daylight Savings, this introduces another apparent one-hour time lag in the data.

Use the controls below to select a different date or time format and to control cell highlighting based on measured ozone, sulfur dioxide, nitrogen dioxide levels. Click on the Generate Report button once you have made your selections.

Click on the Plot Data button once the tabular report has been generated to open a separate window containing data plots.

Select a different site
Month:Day:Year:Time Format:
Ozone Highlights:  Moderate   Unhealthy for Sensitives   Unhealthy   Very Unhealthy  
Sulfur Dioxide Highlights:  Moderate   Unhealthy for Sensitives   Unhealthy   Very Unhealthy   Hazardous  
Nitrogen Dioxide Highlights:  Moderate   Unhealthy for Sensitives   Unhealthy   Very Unhealthy   Hazardous  
Green underline for validated data

The table below contains hourly averages for all the pollutants and meteorological conditions measured at NASA Langley Research Center for Thursday, August 17, 2017. All times shown are in EST.

Parameter MeasuredMorningAfternoon Parameter Measured POC
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00
Ozone 9131412 PM107193748596684604639383835322928 FEW NA Ozone 1 R
Carbon Monoxide 0.30.2 PM0.20.20.20.30.30.20.20.20.20.30.20.20.20.20.20.20.20.20.2 FEW NA Carbon Monoxide 1 R
Sulfur Dioxide 0.20.20.2 PM0.20.10.20.20.20.30.30.30.50.30.30.20.20.20.20.30.20.2 FEW NA Sulfur Dioxide 1 R
Nitric Oxide -0.6 PM-0.8-0.7-0.7-0.41.81.4-0.3-0.6-0.7-0.6-0.8-0.9-1.0-0.8-0.9-0.8-0.9-0.9-0.9-0.9 FEW NA Nitric Oxide 1
Nitrogen Dioxide 9.2 PM3.94.23.94.86.57.34.44.13.66.45.82.31.63.53.03.74.44.85.65.1 FEW NA Nitrogen Dioxide 1 R
Oxides of Nitrogen 8.5 PM3.13.43.14.38.28.64.03.52.85.74.81.30.72.72.12.83.53.84.64.2 FEW NA Oxides of Nitrogen 1
Parameter MeasuredMid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Parameter Measured POC
MorningAfternoon
Maximum values for each parameter are bold within the table. Minimum values are bold italic.
 R - Data from this instrument meets EPA quality assurance criteria for regulatory purposes.

Key to Ozone Highlight Colors:

Hourly ozone levels have been mapped to a surrogate 8-hour average.
The table below shows the levels, color-coding, and suggested actions for the 8-hour surrogate.

Ozone levels in this range are projected to be moderate based on the eight-hour surrogate calculation for Ozone.
  • Unusually sensitive individuals may experience respiratory symptoms.
  • Unusually sensitive people should consider limiting prolonged outdoor exertion.
Ozone levels in this range are projected to be unhealthy for sensitive groups based on the eight-hour surrogate calculation for Ozone.
  • Increasing likelihood of respiratory symptoms and breathing discomfort in active children and adults and people with respiratory disease, such as asthma.
  • Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.

PLEASE NOTE: This data has not been verified by the Virginia DEQ and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from Virginia DEQ ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.